Loading-truck.



T. S. CHESNUTT. LOADING TRUCK. APPLICATION FILED JULY 13, 190s.

91 1 l 1 1 Patented Feb. 2, l99.

i i i lm!!!IIIIIIII"IlIIHIHIHIIIIIIIIIHU m n w T. S. HESNUTT. LADING TRUCK.

APPLIUATION FILED JULY13.19os.

T. S. CHESNUTT.

LOADING TRUCK.

APPLICATION FILED JULY 13, 190s.

Patented Feb. 2, 1909.

3 SHEBTS--SHEET 3.

Witwen UNITED STATES PATENT OFFTOE.

THOMAS S. OHESNUTT, OF OKLAHOMA, OKLAHOMA, ASSIGNOR OF ONlt-FOURTH TO L. LANGFORD, ONE-FOURTH TO PAUL B. SMITH, AND ONE-FOURTH TO WALTER B` THORNTON, ALL OF OKLAHOMA., OKLAHOMA.

LOADING-TRUCK.

Specification of Letters Patent.'

Patented Feb. 2, 1909.

Applicantn ined July 13, 190s. serial No. 443,276.

To all whom 'it may concern:

Be it known that I, THOMAS S. OnEsNUTT, a citizen of the United States, residing at Oklahoma City, in the county of Oklahoma, State of Oklahoma, have invented certain new and useful Improvements in Loading- Trucks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appcrtains to make and use the same.

The present invention has reference to improvements in loading trucks designed particularly for use at ware houses, depots, and freight stations, to facilitate the loading and unloading of live stock and heavy articles of baggage onto and from trains, thc primary object of the invention residing in the rovision of a truck including a vertica y-movable platform raised and lowered by an extremely simple and effective mechanism.

More especially, the invention resides in the particular construction of this mechanism which includes o. pair of parallel sprocket chains arranged adjacent the side edges of the platform and having their ends extending into vertical channels or runways formed in the inner faces of the standardsset at the corners of the truck frame, said chains being engaged by sprockets carried by the end members of a series of inter-geared shafts which are journaled in bearings secured to said frame, one of said shafts being provided with operating devices connected thereto.

The invention further resides in the particular devices employed for holding the drive shaft against backward rotation, and thus preventing displacement of the latform, when the latter has bee; raised aliove the truck frame, and it resides still further in the provision of devices for regulating the speed at which the platform descends, and in the particular construction of such devices.

"lfhe referred embodiment Aof the invention is i lustrated in the accompanying drawings, in which corresponding parts, or features, as the case may be, are designated by the same reference numerals in the seyeral views.

Of the said drawings, Figure 1 is a side elevation of the complete truck, showing the platform in raised position in full lines and in lowered position in dotted lines. Fig. 2 is a plan View thereof. Fig. 3 is a plan view of the truck frame and the operating devices mounted thereon. Fig. 4 is an enlarged vertical section through one of the standards and the chain guide with which it is connected, the chain being likewise shown. Fig. 5 is an enlarged fragmental view of the ond of one of the chains. Fig. 6 is an enlarged longitudinal section through the tank and cylinder of the brake mechanism. Fig. 7 is an enlarged detail view of a modified form of brake mechanism.

eferring more particularly to the drawings, thc open rectangular truck frame which is su ported upon the front and rear wheels 1 am 2 carried by the axles 3 and Ll, is shown as comprising front and rear end members 5 and 6, and left and right hand sides 7 and 8.

'lhe first mentioned members have secured to their inner side faces a pair of laterallyprojecting arms 9 provided with alining openings in which are journaled the front and rear transverse shafts 1() and 11, the right hand end of cach shaft carrying o pinion 12 which .meshes with a pinion 13 secured to the adjacent end of a longitudinal shaft 14 journaled in bearing openings formed in a. pair of lateral brackets 15 secured to the inner side face of the frame member 8.` The left hand end of the shaft 1 1 projects through an opening formed in tho side 7 and is provided at such point with a ratchet wheel 16 rigidly secured thereto and arranged vin spaced relation to the outer sido face of said member, said wheel being arranged for engagement with a pawl 17 carried by an operating lever 18 whose roar ond is provided with an opening through which said .shaft loosely extends. The front and roar members 5 and (i are each provided adjacent their o positc ends with a pair of standards 19 cacli standard terminating in a base plate by means of which it is bolted to the corres ending frame member. 'l'ho inner face ofpeach standard is channeled longiturlinally from end to end as indicated by the numeral 20, the disposition ol' the stand ards upon said frame members being such that the channels above referred to are directly o posite a air of sprockets 21 and 22 with w lich the s afts 10 and 11 are each provided.

The platform 23 which is mounted above lli() the truck frsrne and is movable towards and from the seme by the devices hereinafter described, is provided et its front and rear edges with s pair of laterellyrejecting U--shnped brackets or stirru ps 24 w lichstraddlo the adjacent standards, the bight portion of euch strrup carrying :in entilriclion roller 25 which contacts with the adjacent fece of the stnndnrd. To .lie under l'nco ol' the platform :nljnccnt its front and renr edges nre bolted the upper ends el' n peil' of lutins 26, the grooved linlvs ol' which nire pivoted together by nunns ol. sind rivets 23T, the reinforced bschsiiol the links lining,r in thechannels 2l! in the correrpulnling stendnrds, the rhsins beingl opel-:dvd by the pnirs of sprockets 2l end 22 which eng-ligt; the links of the chains es will be uppancnt, 'i he lower end of the channel in mnh stznnlsrd registers with an opening; formed vertically through the corresponlline immo :A ember, in which opening is littod the npu'atrdly bont outer end ol n tubuhtr guide 2U, :1s shown in. Fig. 4, into which guides the lower ends ol' the chains extend when the plntl'orni is in its lowered position. 'l he end feces of the links ol' noch rhein nre phiin, so es to lit liush n ziinst euch other during the movements of the violins, the chains llexing only dining; their passage :wound the s irocliots, nln'rll, honorer lnlles place slightly before the plntllnn-l rnncluw the limit ol' its downnnrd movement, or in other words, when the lower ends oi tlm (lutins pessinto tho guides 29, the length of the chains boing such that when the plnlform is rniscd the sprockets engage only the innermost links oi the chains.

l rom the foregoing, it will be understood that the rotation of the sntft 1l which is etlccted by moons of the oscillating lever 18 whose pewl engages the ratchet 16, is transmitted to the sisft 14 end thence to the front shaft 10 through the pnirs cl intermeshing pinions 12 and ,13, the several shafts rotating in unison. The rotation 'of theshafts 10 and 11, and the engagement of the s rocflets 2l and Z2 cnrried thereby with the cliains 26, will canse the platform to move bodily upwerdlystove the truck frame, the necessary rigidity being imparted to the Challis lv renson of the pnrticulnr construction of the links thereof, fi. e., the formation of the same with plein feces.

The front and rein' freine members 5 und 6 are further connected by e peir el lengt tudinsl reaches 3() end 31 arranged in s :iced relation to each other, sind. reaches icing connected together by Ineens of n series of cross pieces 32 which support n longitudinally-channeled beam S3. At their front ends the reaches 31 end 32 su )port an oil tank 34 with the lower portion oi which com inunicotcs n cylinder 35, the comme ncntion being opened und closed by e cut-ell' valve l l wards t 36 provided with a. stem 37 which extends throu h an openin formed in the frame side 8 im has a han wheel 38 secured to its outer end. Within the cylinder 35 is movable the head 39 of a. piston whose stem 40 is provided with s. lon tudinel series of rack teeth 4I., seid stem tting in the channel in the beam The iston heed 39 is provided with en inwer y-extend'ing Het valve 42. The reel( teeth. 41 with which the piston stem is provided are engaged by a. pinion 43 secured to the inner end of e transverselydis iosed shaft 44 journaled in brackets carrie( by the reach 3() and by e. brace 45 which connects seid reach with the frame member 8. The outer end of the shaft 44 is provided with a pinion 46 which meshes with a. pinion 47 secured to the shalt 14. By rea.-

son of this construction, the rotation of the snilt 14 will ell'cct thstof the shaft 44 and of the pinion 43 carried by the lait ter, the movement of the pinion effecting sn endwise outward movement of the piston by reason of the engagement of the gear 43 with the rack tccth 41. The movement of the piston will cll'ect the lilling of the cylinder 35 with oil ns will be understood. When the platform has l een rnised to the desired height, the cut-oli` volvo 36 is turned in the proper direction by means ol' ils heed wheel, to close the com municnion ll'etwcen the cylinder and the tenir. The ressure of the oii in the cylinder against the i eed of the iston, which latter es sleted, is then et the imit of its outward movement, will retain the platform in its elevated position.

When the platform is to be lowered, the communication between the cylinder and the tanlrlis opened by means of the cut-otl` valve, whereupon the lstfo'rm will slowly descend, the speed of suc i descent being regulated by the cut-ofi valve whose position regulates the llow of the oil to the tank. When the platform resches a certain point in its downward movement, the lower ends ofthe chains pass around the sprockets and enter the nidos, as above stated.

While the descent of the latform is preferably controlled by the iiydraulic brake mechanism above described, it is to be under stood that the invention is not entirely dependent u )on such mechanism, since it may )e replace by the friction broke mechanism shown in l i 7, suchmechenism comprising e friction w wel 48 secured to the shaft 11 and interposed between the ratchet whel 16 und the iwdiaoent fece o f the frame member'V 7, aA friction bend 49 embracing said wheel, und s. lever 5() ivoted lo en cer formed edjecent the biocllr 51 with which one of 1h15 ends of the bend 19 is provided, seid lever ellectino the movement of seid bck t0- ,tlie block 52 located et the other end the band. lt will thus be seen that the invention inetudes mee'ianism for raising the piatorm to the desired height, mechanism for retaining the platform in its elevated position, an mechanism for effecting a gradual descent of the platform after the loading or unloading has een completed.

What is claimed is:

1` The combination, with the frame of a truck, and a standard located at each corner of the frame and having its inner face longi tudinally channeled, of a vertically-movable platform mounted upon the frame and provided at each corner with a laterally-proj ecting member engaging the adjacent standard; a depending member secured to each corner of the platform and fitted in the channel of the adjacent standard; and means engaged with said depending members, for raising the platform into elevated position.

2. The combination, with the frame of a truck and a standard located at each corner of the frame and having its inner face longitudinally channeled, of a vertically-movable platform mounted upon the frame and pro vided at each corner with a laterally-projecting member engaging the adjacent standard; a depending member secured to cachcorner of the platform and fitted in the channel of the adjacent standard; means engaged with said depending members, for raising the platform into 'elevated Vpesition-grandseparate mechanism for controlling the speed at which the platform descends.

3. The combination, with the frame of a truck and a standard located at each corner of theframe and having its inner face longitudinally channeled, of a vertically1novable platform mounted upon the frame and pro vided at each corner with a laterally-projecting member engaging the adjacent standard; a depending membersccured to cach corner of the platform and fitted in the channel of the adjacent standard; and front and rear transverse shafts carried by the frame; means for rotating said shafts in unison; and means carricd by each shaft and arranged for engage- -ment with said depending members, to raise the platform into elevated position when said shafts are rotated in one direction.

4. The combination, with the frame of a truck and a standard located at each corner of the frame and having its inner face longitudinally channeled, of a vertically-movable upon the frame and proplatform mounted vided at each corner with a laterally-projecting member engaging the adjacent standard; a depending member secured to each corner of the platform and fitted in the channel of the adjacent standard; front and rear transverse shafts carried by the frame; means for rotating said shafts in unison; means carried by each shaft and arranged for engagement with said depending members, to raise the platform into elevated position when said shafts are rotated in one direction; and separate mechanism for controlling the speed at which the platform descends.

5. The combination, with the frame of a truck, of a standard located at each corner of the frame and having its inner face longitudinelly channeled, each corner of the frame being provided with an opening registering with the channel in the adjacent standard; a series of tubular guides having their outer ends fitted in said openings; a verticallymovable platform mounted upon the frame and provided at each corner with a depending member fitted in the channel in the adjacent standard; and means engaged with said members, for rai-sing the platform into elcvated position, the lower .ends of said mem` bers entering said guides when the platform descends.

6. The combination, with the frame of a truck, of a standard located at each corner of the frame and having its inner face longitudi nallv channeled, each corne:` of the frame being provided with an opening registering with the channel in the adjacent standard; a series of tubular guides having their outer ends fitted in `said openings; a verticallymovable platform mounted upon the frame and provided at each corner with a depending member fitted-in tli'e'cliifew'''lffii cc'nt standard; means engaged with saidmembcrs, for raising the platform into elevatcd position, the lower ends of said members entering said guides 'when the platform descends; and separate mechanism for con trolling thc speed at which the platform de scends.

7. The combination, with the frame of a truck, of a standard located at each corner of the frame and having its inner face longitudinally channeled, each corner of the frame being provided with an opening registering with the channel in the ad acont standard; a series ofA tubular horizonte guides each provided with an uptul'ncd outer end fitted in the adjacent opening; a vertically-movable platform mounted upon the frame and nrovided at each corner with a depending exible member fitted in the channel in the adjacent standard; and means enga ed with said members, for raising the plat ornl into elevated position, the lower ends of said members entering said guides when the platform descends.

8. The combination, with the frame 0f a truck, of a standard located at each corner of the frame and having its inner face longitudinally channeled each corner of the frame beinJr provided with an o ening registering witli the channel in t e adjacent standard; a series of tubular guides having their outer ends 'fitted in said openings; a vertically-movable platform mounted u on the frame; a laterallyprojecting mem ersecured to each corner of t eplatform and adapted for engagement with the adjacent standard; a series of sprocket chains each secured at its u per end to one of the corners of the lat erm and itted in the channel in the a 'acent standard; 'front and rear transverse s afts carried by the frame; means for rotating said shafts in unison; and a pair of s )rockets carried by each shaft and arranged or engagement with the adjacent chains, to raise the platform into elevated position when said shafts are rotated in one direction, the lower ends ol said chains ontering said guides as the platform descends.

9. The combination, with the frame of a truck, of a standard located at each corner of the frame and having its inner face longi tu dinally channeled, each corner of the [rame being rovided with an opening registering with t e channel in the adjacent standard.; a series of tubular horizontal guides cach provided with an upturned outer end iittcd in the adjacent opening; a vertically-movable platform mounted upon the frame; a laterally-projecting member secured to each corner of the platform and adapted for engagement with the adjacent standard; a series of sprocket chains each secured at its upper end to one of the corners of the platform and fitted in the channel in the adjacent standard; front and rear transverse shafts carried by the frame; means for rotating said shafts in unison; a pair ol s rockets carried by each shaft and arranged or engagement. with the adjacent chains, to raise the 'latform into elevated position when sai( shafts are rotated in one direction, the lower ends of said chains entcrin said guides as the platform descends; an( separate mechanism 'for controlling the speed at which the platform descends.

10. The combination, with the frame of a truck, of a platform mounted above the truck and movable towards and from the same; mechanism for raising the platform into elevated position; and separate h draulic brake mechanism for controlling tiie speed at which the latform descends.

11. The combination, with the frame of a truck and a standard located. at each corner of the 'l' rame and having its` inner face longi tudinally channeled, of a vertically-movable platform mounted upon the frame and provided at each corner with a laterally-projecting member engaging the adjacent standard; a de )ending member secured to each corner of tlie platform and fitted in the channel ol the adjacent standard; means engaged with said depending members, i'or raisin the platform into elevated position; an hydraulic brake mechanism for controlling the speed at which the platform descends.

12. The combination, with the trarne of a truck, and a standard located at each corner of the frame and having its inner face longitudinally channeled, of a vertically-movable platform mounted upon the frame and provided at each corner with a laterally-projecting member engaging the adjacent standard, d de ending member secured to cfch corner of tlhe platform and fitted in the channel inthe adjacent standard; front and rear transverse shafts carried by the frame; means for rotating said shafts in unison; means carried by each shaft and arranged for engagement with the adjacent dependm members, to raise the platform into elevate position when said shafts are rotated in one direction and a hydraulic brake mechanism for controlling the rotation oi` the shafts in the other direction, to regulate the speed at which the platform descends.

In testimony whereof, I affix my signature, in presence of two witnesses.

THOMAS S. CHESNUTT. Witnesses:

W. A. STEVENS, W. C. Gowme. 

